Milk protein is a naturally derived ingredient used in skincare for its film-forming and humectant properties, helping to soften, smooth, and condition the skin. It is typically included to improve skin feel and surface hydration rather than to deliver a specific therapeutic effect.
| Reported effect | How often | Notes |
|---|---|---|
| Allergic contact dermatitis | Uncommon | May occur in individuals with milk or dairy protein sensitivity, presenting as redness, itching, or rash. |
| Mild skin irritation | Uncommon | Transient stinging or redness, more likely on compromised or sensitive skin. |
| Contact urticaria | Rare | Hives or localized swelling reported in those with milk protein allergy. |
| Systemic allergic reaction | Very rare | Severe hypersensitivity is uncommon from topical use but theoretically possible in highly allergic individuals. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.